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Last name Roini (Roini , Роини ) , throughout the world, is quite a rare surname. The family name Roini is characteristic of Georgia, where it is quite a common surname, Finland, where it is quite a rare surname, and Norway, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Georgia, Indonesia, and Finland. Also, Roini is the forename as well as the last name.